Gas-producer.



No. 662,923. Patented nec. 4, |900.

` E. J. DUFF;

GAS PRODUCER. (Application ined .my 17, 1900., (No Model.) 2 Sheets--Shest l.

Patented Dec. 4, |900.

sAs Pnonucen. (Aypxicmon alga #my 17, 1900.)

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iNvENToR @SW2 Mw @ff WITNESS ES MYC2/M f QW..

ATTORNE YS .NITED STATES PATENT Frisia,

EDWARD JAMES DUEF., OF LIVERPOOL, ENGLAND;

GAS-PRODUCER.

SPECIFICATION forming part of Letters Dat-em; No. 662,923, dated December 4, 1906.

' I Application filed July 1'7, 1900. `Serial No. 23,913. (No model.)

To all whom, it may concern:

Be it known that I, EDWARD JAMES DUFF, a subject of the Queen of Great Britain and Ireland, and a resident of Liverpool, in the county of Lancaster, England, (whose postal address is Holly Lodge, Oressington Park, Liverpool, England,) have invented certain Improvements in Gas-Producers, (for which I have applied for British Patent No. LL10,

dated January 8, 1900,) of which the following is a speciiication. i

This invention has for its object the production of gas from bituminous coal, and the gas-producer is so arranged and constructed that the green coal is coked in the upper portion of the tire and the products of condensable portions of the gas which contain soot, oils, and tar are conducted to the lower portions of the fire and made to traverse the zone of combustion or hotter regions of the fuel-bed, so that they are converted into lixed incondensable gases suitable for use ingas-engines and for other purposes and requiring only a similar amount of cooling and scrubbing as the gases now used for gas-engines when made from anthracite or coke; The air for combustion or gasification is made to traverse the zone of combustion or lower portions of the fuel and is led off at one side of the producer along with the gases which have been rendered lixed and incondensable by being passed through the lower portion of the fire, as hereinbefore described.

In the accompanying explanatorydrawings, Figure 1 is a vertical section, and Fig. 2 is a part plan and part section, of the improved gas-producer.

In carrying out the invention there is provided a casing consisting of a number of iron plates A, lined with fire-brick B. The upper half of the producer-casing is also divided by tire-brick C, extending across from one side of the casing to the other, so that a i'lue D is formed at one side leading to an outlet-fine E near the middle of the top part of that side. The coals are tedin through a hopper F on the top of the casing, this hopper being fitted with feeding mechanism G of ordinary construction. At one side of the casing inclined gratings H are provided, these gra-tings being supported at their upper and lower ends on girders .I K. The air or air and steam densable gases.

for combustion or gasification enters one end of the casing by a pipe L entering beneath the gratings H, and the air passing up through the gratings is distributed so as to act uniformly among the coals in the lower half or Zone of combustion of the fuel-bed. Extending along the opposite side of the casing similar inclined gratings M are also provided, these gratings being similarly supported ou girders N P. The green coal is coked in the upper portion of the fuel-bed, and the products therefrom, which are condensable gases containing soot, oils, and tar, are led by a pipe Q, passing from the upper end of the casing down to the space beneath the inclined gratings M, from which space the condensable portions of the gas pass u p through the gratings M and enter the zone of combustion, where they are converted into fixed incon- By leading these gases into a chamber below the fuel-bed separate from the chamber into which the air for supporting combustion is blown the gases can traverse the zone of combustion without coming into contact with the air-supply, and by this means such' gases become fixed and free from combustible matters without being burned or destroyed by combustion with the air.

To assist in the circulation of the gases, a jet of steam or steam and air is injected through a blower-nozzle R into the lower end of the pipe Qn The tixedincondensable gases produced pass off by the iiue D to the outletiiue E. Between the two sets of gratings H `M there is a free spaces, through which the ashes fall freely into an ash-trough T, which is of the width of the space between two of the sides of the structure, but elongated in the other direction, so as to extend under and beyond the other two sides of the structure, whichv sides are supported across it by girders U. The ends of the trough T where they extend beyond the sides of the structure have their bottoms inclined or sloped upward, and the ashes or coal residues are raked out at these ends of the trough T, which is iilled with water to seal the bottom of the structure. Some of the ashes or residues will also fall into the trough T through the inclined gratings H M, and should there be any tendency for such ashes to adhere between the gratings they can be removed by the in- IOO sertion of a rake through doors V, provided for the purpose A similar door W is provided at a higher part of the casing to permit of examination of the interior of the casing. Moisture rises from the water in the ashtrough T to the spaces beneath the gratings y I-I'M and to the ash-outlet or free-space lS and tends to cool the gratings and the de` i scending ashes, thereby preventing the de-y sealed-bottom trough, an inlet for air or air and steam beneath the gratings on one side,

-a pipe leading from the upper portion .of the fuel-bed and communicating with a space beneath the gratings onvthe other side; and a side ue extending upward from about half the height of the fuel-bed substantiallyas and for the purposes herein setforth.

2. A gas-producer having gratings in the lower portion of the casing, two separate spaces below7 the fuel-bed, means for the admission of air for supporting combustion to vone space, a pipe leading from the` upper portion of the fuel-bed to the other separate space and a side fine extending-upward from about half the height of the fuel-bed, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

EDWARD JAMES DUFF.

Witnesses:

WM. PIERCE, H. WATSON. 

